@article{4d923b846b9e4d5a8310bdcd38a6834e,
title = "Observation of the Bc meson in pp¯ collisions at √s = 1.8 TeV",
abstract = "We have observed bottom-charm mesons via the decay mode B± c → J/ψl±ν in 1.8 TeV pp¯ collisions using the CDF detector at the Fermilab Tevatron. A fit of background and signal contributions to the J/ψl mass distribution yielded 20.4+6.2 -5.5 events from Bc mesons. A fit to the same distribution with background alone was rejected at the level of 4.8 standard deviations. We measured the B+ c mass to be 6.40 ± 0.39(stat) ± 0.13(syst) GeV/c2 and the B+ c lifetime to be 0.46+0.18 -0.16(stat) ± 0.03(syst)ps. Our measured yield (production cross section times branching ratio) for B± c → J/ψl+ν relative to that for B+ → J/ψK+ is 0.132+0.041 -0.037(stat) ± 0.031(syst)+0.032 -0.020(lifetime).",
author = "{CDF Collaboration} and F. Abe and H. Akimoto and A. Akopian and Albrow, {M. G.} and A. Amadon and Amendolia, {S. R.} and D. Amidei and J. Antos and S. Aota and G. Apollinari and T. Arisawa and T. Asakawa and W. Ashmanskas and M. Atac and P. Azzi-Bacchetta and N. Bacchetta and S. Bagdasarov and Bailey, {M. W.} and {de Barbaro}, P. and A. Barbaro-Galtieri and Barnes, {V. E.} and Barnett, {B. A.} and M. Barone and G. Bauer and T. Baumann and F. Bedeschi and S. Behrends and S. Belforte and G. Bellettini and J. Bellinger and D. Benjamin and J. Bensinger and A. Beretvas and Berge, {J. P.} and J. Berryhill and S. Bertolucci and S. Bettelli and B. Bevensee and A. Bhatti and K. Biery and C. Bigongiari and M. Binkley and D. Bisello and Blair, {R. E.} and C. Blocker and S. Blusk and A. Bodek and W. Bokhari and G. Bolla and Y. Bonushkin",
year = "1998",
doi = "10.1103/PhysRevLett.81.2432",
language = "English (US)",
volume = "81",
pages = "2432--2437",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "12",
}